Finding the Fourth Proportional to 9,902.15, 13,664.76 and 5,425.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.15 : 13,664.76 = 5,425.68 : x
2. Step 2: Convert to fraction form
   9,902.15/13,664.76 = 5,425.68/x
3. Step 3: Cross multiply
   9,902.15x = 13,664.76 × 5,425.68
4. Step 4: Simplify right side
   9,902.15x = 74,140,615.04
5. Step 5: Solve for x
   x = 74,140,615.04/9,902.15
6. Step 6: Final answer
   x = 7,487.32